关闭过热器向空排汽,汽包水位如何变化?
参考答案:
下降。
Not until ___to do my homework ____ how much time I had wasted playing computer games.
A.I began; I realized
B.I began; did I realize
C.did I begin; I realized
D.did I begin; did I realize
地方政府之间纵向关系的基础是政府间的()关系。
A.平行
B.交叉
C.指导
D.管辖